How to add a UIButton at runtime

Question

I am trying to add a UIButton at runtime however it is not visible. What am I doing wrong?

- (id)initWithFrame:(CGRect)frame {
    if (self = [s         


        

Answer 1

You must release btn and remove ":" in buttonClick:

UIButton *btn= [[UIButton buttonWithType:UIButtonTypeRoundedRect] retain];
btn.frame = CGRectMake(0, 0, 100, 25);
btn.backgroundColor = [UIColor clearColor];
[btn setTitle:@"Play" forState:UIControlStateNormal];
[btn addTarget:self action:@selector(buttonClick) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:btn]; 
[btn release];